TRANSFORMER SITAS; PHASES:1; PN/PN(S6)(KVA):4 /16; UPRI(V):440+/-5%; USEC(V):230; ISEC(A):17,4; F(HZ):50...60; VECTOR GR./SHIELD WNG.:II0 /0; TA/ISOKL:55 /H; IP00; TYPE OF TERMINALS:SCREW CONNECTION; INSTALLATION:SCREW; EN 61558-2-1, -2-2, -2-4 UL/CSA-RECOGNIZEDCONTROL CIRCUIT TRANSFORMERISOLATION TRANSFORMER The 4AT transformers unite all properties of single-phase safety, isolating, control and line transformers.